If your point is that one human can't admin an entire internet then sure you are technically correct (best type). But that isn't a useful point - the web is still highly decentralised even though it takes more than one person to run it.

Both those domains at various times have had disagreements with their registrars, with their ISPs and with bodies on the internet more powerful than that. Hasn't made any difference to whether I can connect to them or not, because there are always alternative paths and vendors. Which is more or less what it means to be decentralised. In practice, being able to replace any party and keep on going is the capability that matters.